 
package com.heima.wemedia.service.impl;
import com.alibaba.fastjson.JSON;
import com.baomidou.mybatisplus.core.conditions.Wrapper;
import com.baomidou.mybatisplus.core.conditions.query.LambdaQueryWrapper;
import com.baomidou.mybatisplus.core.metadata.IPage;
import com.baomidou.mybatisplus.core.toolkit.Wrappers;
import com.baomidou.mybatisplus.extension.plugins.pagination.Page;
import com.baomidou.mybatisplus.extension.service.impl.ServiceImpl;
import com.heima.common.constants.WemediaConstants;
import com.heima.common.constants.WmNewsMessageConstants;
import com.heima.common.exception.CustomException;
import com.heima.model.common.dtos.PageResponseResult;
import com.heima.model.common.dtos.ResponseResult;
import com.heima.model.common.enums.AppHttpCodeEnum;
import com.heima.model.wemedia.dtos.NewsAuthDto;
import com.heima.model.wemedia.dtos.WmNewsDto;
import com.heima.model.wemedia.dtos.WmNewsPageReqDto;
import com.heima.model.wemedia.pojos.WmMaterial;
import com.heima.model.wemedia.pojos.WmNews;
import com.heima.model.wemedia.pojos.WmNewsMaterial;
import com.heima.model.wemedia.pojos.WmUser;
import com.heima.model.wemedia.vos.WmNewsVo;
import com.heima.utils.thread.WmThreadLocalUtil;
import com.heima.wemedia.mapper.WmMaterialMapper;
import com.heima.wemedia.mapper.WmNewsMapper;
import com.heima.wemedia.mapper.WmNewsMaterialMapper;
import com.heima.wemedia.mapper.WmUserMapper;
import com.heima.wemedia.service.WmNewsAutoScanService;
import com.heima.wemedia.service.WmNewsService;
import com.heima.wemedia.service.WmNewsTaskService;
import lombok.RequiredArgsConstructor;
import lombok.extern.slf4j.Slf4j;
import org.apache.commons.lang.StringUtils;
import org.apache.kafka.common.protocol.types.Field;
import org.checkerframework.checker.units.qual.A;
import org.springframework.beans.BeanUtils;
import org.springframework.kafka.core.KafkaTemplate;
import org.springframework.stereotype.Service;
import org.springframework.transaction.annotation.Transactional;

import java.util.*;
import java.util.stream.Collectors;

@Service
@RequiredArgsConstructor
@Slf4j
@Transactional
public class WmNewsServiceImpl  extends ServiceImpl<WmNewsMapper, WmNews> implements WmNewsService {

    private final WmNewsMaterialMapper wmNewsMaterialMapper;

    private final WmMaterialMapper wmMaterialMapper;

    private final WmNewsAutoScanService wmNewsAutoScanService;
    private final WmNewsTaskService wmNewsTaskService;
    private final KafkaTemplate<String,String> kafkaTemplate;
 
    /**
     * 查询文章
     * @param dto
     * @return
     */
    @Override
    public ResponseResult findAll(WmNewsPageReqDto dto) {
 
        //1.检查参数
        if(dto == null){
            return ResponseResult.errorResult(AppHttpCodeEnum.PARAM_INVALID);
        }
        //分页参数检查
        dto.checkParam();
        //获取当前登录人的信息
        WmUser user = WmThreadLocalUtil.getUser();
        if(user == null){
            return ResponseResult.errorResult(AppHttpCodeEnum.NEED_LOGIN);
        }
 
        //2.分页条件查询
        IPage page = new Page(dto.getPage(),dto.getSize());
        LambdaQueryWrapper<WmNews> lambdaQueryWrapper = new LambdaQueryWrapper<>();
        //状态精确查询
        if(dto.getStatus() != null){
            lambdaQueryWrapper.eq(WmNews::getStatus,dto.getStatus());
        }
 
        //频道精确查询
        if(dto.getChannelId() != null){
            lambdaQueryWrapper.eq(WmNews::getChannelId,dto.getChannelId());
        }
 
        //时间范围查询
        if(dto.getBeginPubDate()!=null && dto.getEndPubDate()!=null){
            lambdaQueryWrapper.between(WmNews::getPublishTime,dto.getBeginPubDate(),dto.getEndPubDate());
        }
 
        //关键字模糊查询
        if(StringUtils.isNotBlank(dto.getKeyword())){
            lambdaQueryWrapper.like(WmNews::getTitle,dto.getKeyword());
        }
 
        //查询当前登录用户的文章
        lambdaQueryWrapper.eq(WmNews::getUserId,user.getId());
 
        //发布时间倒序查询
        lambdaQueryWrapper.orderByDesc(WmNews::getCreatedTime);
 
        page = page(page,lambdaQueryWrapper);
 
        //3.结果返回
        ResponseResult responseResult = new PageResponseResult(dto.getPage(),dto.getSize(),(int)page.getTotal());
        responseResult.setData(page.getRecords());
 
        return responseResult;
    }

    /**
     * 发布修改文章或保存为草稿
     * @param dto
     * @return
     */
    @Override
    public ResponseResult submitNews(WmNewsDto dto) {
        //0.条件判断
        if(dto==null || dto.getContent()==null){
            return ResponseResult.errorResult(AppHttpCodeEnum.PARAM_INVALID);
        }

        //1.保存或修改文章
        WmNews wmNews=new WmNews();
        //属性拷贝
        BeanUtils.copyProperties(dto,wmNews);
        //封面图片  list--> string
        if(dto.getImages() !=null && dto.getImages().size()>0){
            String imageStr = StringUtils.join(dto.getImages(), ",");
            wmNews.setImages(imageStr);
        }
        //如果当前封面类型为自动 -1
        if(dto.getType().equals(WemediaConstants.WM_NEWS_TYPE_AUTO)){
            wmNews.setType(null);
        }

        saveOrUpdateWmNews(wmNews);

        //2.判断是否为草稿，如果是结束当前方法
        if(dto.getStatus().equals(WmNews.Status.NORMAL.getCode())){
            return ResponseResult.okResult(AppHttpCodeEnum.SUCCESS);
        }

        //3.不是草稿，保存文章内容图片与素材的关系
        //获取到文章内容中的图片信息
        List<String> materials=ectractUrlInfo(dto.getContent());
        saveRelativeInfoForContent(materials,wmNews.getId());

        //4.不是草稿，保存文章封面图片与素材的关系，如果当前布局是自动，需要匹配封面图片
        saveRelativeInfoCover(dto,wmNews,materials);

        //审核文章
        //wmNewsAutoScanService.autoScanWmNews(wmNews.getId());
        wmNewsTaskService.addNewsToTask(wmNews.getId(),wmNews.getPublishTime());
        return ResponseResult.okResult(AppHttpCodeEnum.SUCCESS);
    }

    /**
     * 查看文章详情
     * @param id
     * @return
     */
    @Override
    public ResponseResult article_details(Integer id) {
        if(id==null){
            return ResponseResult.errorResult(AppHttpCodeEnum.PARAM_INVALID);
        }
        WmNews wmNews = getById(id);
        if(wmNews==null){
            return ResponseResult.errorResult(AppHttpCodeEnum.AP_USER_DATA_NOT_EXIST);
        }
   /*     ResponseResult responseResult=new ResponseResult();
        responseResult.setHost("https://itheima.oss-cn-beijing.aliyuncs.com");
        responseResult.setCode(200);
        responseResult.setErrorMessage("操作成功");
        responseResult.setData(wmNews);
        return responseResult;*/
        return ResponseResult.okResult(wmNews);
    }

    /**
     * 删除文章
     * @param id
     * @return
     */
    @Override
    public ResponseResult del_news(Integer id) {
        if(id==null){
            return ResponseResult.errorResult(AppHttpCodeEnum.PARAM_INVALID);
        }
        WmNews wmNews = getById(id);
        Short status = wmNews.getStatus();
        if(wmNews==null){
            return ResponseResult.errorResult(AppHttpCodeEnum.DATA_NOT_EXIST);
        }
        if(status==9){
            return ResponseResult.errorResult(501,"文章已发布，不可删除");
        }
        removeById(id);
        return ResponseResult.okResult(AppHttpCodeEnum.SUCCESS);
    }

    /**
     * 上下架
     * @param dto
     * @return
     */
    @Override
    public ResponseResult down_or_up(WmNewsDto dto) {
        if(dto.getId()==null){
            return ResponseResult.errorResult(AppHttpCodeEnum.PARAM_INVALID);
        }
        WmNews wmNews = getById(dto.getId());
        if(wmNews==null){
            return ResponseResult.errorResult(AppHttpCodeEnum.DATA_NOT_EXIST);
        }
        if(!wmNews.getStatus().equals(WmNews.Status.PUBLISHED.getCode())){
            return ResponseResult.errorResult(501,"当前文章不是发布，不能上下架");
        }

        //4.修改文章enable
        if(dto.getEnable() > -1 && dto.getEnable() < 2){
            update(Wrappers.<WmNews>lambdaUpdate().set(WmNews::getEnable,dto.getEnable())
                    .eq(WmNews::getId,wmNews.getId()));


            //发送消息，通知article端修改文章配置
            if(wmNews.getArticleId() != null){
                Map<String,Object> map = new HashMap<>();
                map.put("articleId",wmNews.getArticleId());
                map.put("enable",dto.getEnable());
                kafkaTemplate.send(WmNewsMessageConstants.WM_NEWS_UP_OR_DOWN_TOPIC,JSON.toJSONString(map));
            }
        }
        return ResponseResult.okResult(AppHttpCodeEnum.SUCCESS);
    }

    private final WmNewsMapper wmNewsMapper;

    /**
     * 分页
     * @param dto
     * @return
     */
    @Override
    public ResponseResult list_vo(NewsAuthDto dto) {
        if(dto==null){
            return ResponseResult.errorResult(AppHttpCodeEnum.PARAM_INVALID);
        }
        dto.checkParam();

        dto.setPage((dto.getPage()-1)*dto.getSize());
        List<WmNewsVo> wmNewsVoList = wmNewsMapper.findListAndPage(dto);

        int count=wmNewsMapper.findListCount(dto);

        ResponseResult responseResult=new PageResponseResult(dto.getPage(),dto.getSize(),count);
        responseResult.setData(wmNewsVoList);
        return responseResult;
    }

    private final WmUserMapper wmUserMapper;

    /**
     * id查询单个文章
     * @param id
     * @return
     */
    @Override
    public ResponseResult OneById(Integer id) {
        if(id==null){
            return ResponseResult.errorResult(AppHttpCodeEnum.PARAM_INVALID);
        }
        WmNews wmNews = getById(id);
        if(wmNews==null){
            return ResponseResult.errorResult(AppHttpCodeEnum.DATA_NOT_EXIST);
        }
        WmNewsVo wmNewsVo=new WmNewsVo();
        BeanUtils.copyProperties(wmNews,wmNewsVo);
        WmUser wmUser = wmUserMapper.selectById(wmNews.getUserId());
        if(wmUser != null){
            wmNewsVo.setAuthorName(wmUser.getName());
        }
        return ResponseResult.okResult(wmNewsVo);
    }

    /**
     * 人工审核  pass or fail
     * @param dto
     * @param status
     * @return
     */
    private final WmNewsAutoScanServiceImpl wmNewsAutoScanServiceImpl;
    @Override
    public ResponseResult AuthStatus(NewsAuthDto dto, Short status) {
        if(dto==null ||dto.getId()==null){
            return ResponseResult.errorResult(AppHttpCodeEnum.PARAM_INVALID);
        }
        WmNews wmNews = wmNewsMapper.selectById(dto.getId());
        if(wmNews==null){
            return ResponseResult.errorResult(AppHttpCodeEnum.DATA_NOT_EXIST);
        }
        wmNews.setStatus(status);
        if(StringUtils.isNotBlank(dto.getMsg())){
            wmNews.setReason(dto.getMsg());
        }
        updateById(wmNews);

        //审核成功后，则需要创建app端文章数据，并修改自媒体文章
        if(status.equals(WemediaConstants.WM_NEWS_AUTH_PASS)){
            ResponseResult responseResult = wmNewsAutoScanServiceImpl.saveAppArticle(wmNews);
            if(responseResult.getCode().equals(200)){
                wmNews.setArticleId((Long) responseResult.getData());
                wmNews.setStatus(WmNews.Status.PUBLISHED.getCode());
                updateById(wmNews);
            }
        }
        return ResponseResult.okResult(AppHttpCodeEnum.SUCCESS);
    }


    /**
     * 第一个功能：如果当时封面类型为自动，则设置封面类型的数据
     * 1.内容图片大于1小于3 单图 type 1；大于3 多图 type 3；没有图 type 0
     * 第二个功能： 保存封面图片与素材的关系
     */
    private void saveRelativeInfoCover(WmNewsDto dto, WmNews wmNews, List<String> materials) {
        List<String> images = dto.getImages();

        //如果当前封面类型为自动，则设置封面类型的数据
        if(dto.getType().equals(WemediaConstants.WM_NEWS_MANY_IMAGE)){
            //多图
            if(materials.size()>=3){
                wmNews.setType(WemediaConstants.WM_NEWS_MANY_IMAGE);
                images=materials.stream().limit(3).collect(Collectors.toList());
            }else if(materials.size()>=1 && materials.size()<3){
                //单图
                wmNews.setType(WemediaConstants.WM_NEWS_MANY_IMAGE);
                images=materials.stream().limit(1).collect(Collectors.toList());
            }else {
                //无图
                wmNews.setType(WemediaConstants.WM_NEWS_MANY_IMAGE);
            }

            //修改文章
            if(images!=null && images.size()>0){
                wmNews.setImages(StringUtils.join(images,","));
            }
            updateById(wmNews);
        }

        if(images!=null && images.size()>0){
            saveRelativeInfo(images,wmNews.getId(),WemediaConstants.WM_COVER_REFERENCE);
        }


    }



    /**
     * 处理文章内容图片与素材的关系
     * @param materials
     * @param newsId
     */
    private void saveRelativeInfoForContent(List<String> materials, Integer newsId) {
        saveRelativeInfo(materials,newsId,WemediaConstants.WM_CONTENT_REFERENCE);
    }

    /**
     * 保存文章与素材的关系到数据库中
     * @param materials
     * @param newsId
     * @param type
     */
    private void saveRelativeInfo(List<String> materials, Integer newsId, Short type) {
        if(materials!=null && !materials.isEmpty()){
            //通过图片的url查询素材id
            List<WmMaterial> dbMaterials = wmMaterialMapper.selectList(Wrappers.<WmMaterial>lambdaQuery().in(WmMaterial::getUrl, materials));

            //判断素材是否有效
            if(dbMaterials==null || dbMaterials.size()==0){
                //手动抛出异常 功能1：能够提示调用者素材失效，功能2：数据回滚
                throw new CustomException(AppHttpCodeEnum.MATERIASL_REFERENCE_FAIL);
            }

            if(materials.size()!= dbMaterials.size() ){
                throw new CustomException(AppHttpCodeEnum.MATERIASL_REFERENCE_FAIL);
            }

            List<Integer> idList = dbMaterials.stream().map(WmMaterial::getId).collect(Collectors.toList());

            //批量保存
            wmNewsMaterialMapper.saveRelations(idList,newsId,type);
        }
    }

    /**
     * 提取文章内容中的图片信息
     * @param content
     * @return
     */
    public List<String> ectractUrlInfo(String content) {
        List<String> materials=new ArrayList<>();

        List<Map> maps= JSON.parseArray(content,Map.class);

        for (Map map:maps){
            if(map.get("type").equals("image")){
                String imgUrl=(String) map.get("value");
                materials.add(imgUrl);
            }
        }
        return materials;
    }

    /**
     * 保存或者修改文章
     * @param wmNews
     */
    private void saveOrUpdateWmNews(WmNews wmNews) {
        //补全属性
        wmNews.setUserId(WmThreadLocalUtil.getUser().getId());
        wmNews.setCreatedTime(new Date());
        wmNews.setSubmitedTime(new Date());
        wmNews.setEnable((short) 1);  //默认上架

        if(wmNews.getId()==null){
            //保存
            save(wmNews);
        }else {
            //修改
            //删除文章图片与素材的关系
            wmNewsMaterialMapper.delete(Wrappers.<WmNewsMaterial>lambdaQuery().eq(WmNewsMaterial::getNewsId,wmNews.getId()));
            updateById(wmNews);
        }
    }


}